I'm trying to jailbreak, iPod Touch 4g (iOS 5), on Windows 7, but after I entered DFU mode, it said: Am I doing something wrong?
I think it wants you to download the ipsw yourself and point it to the file by clicking extras and select the file.
http://www.felixbruns.de/iPod/firmware/ download it there OR navigate to /YourComputerUsername/Appdata ...
to find the appdata folder, you have to go to control panel/folder options/ and unhide hidden folders
If you are on a windows machine, type %APPDATA% in the run box, and go to apple computer, itunes, software updates